The art of dance is alive and well in the Hudson Valley, with a plethora of companies and schools dedicated both to its performance and its preservation by teaching new generations. To keep that flame alive in the dark days of midwinter, each February the Vanaver Caravan organizes a Terpsichorean blowout that gives many of the region’s dance schools a chance to shine. They’ve been putting on the eclectic show that they call DanceFest for 21 years, and this time 11 schools from Ulster and Dutchess Counties will participate.